so i'm new to hanging, just got some starter gear and i want to create a hanging spot in my backyard. i'm gonna sink some 4x4 posts into my lawn and hang between 'em. how far apart should they be? this will be for my first hang, and will become my laboratory for testing whatever gear i get going forward. i may or may not put eye bolts rated for angluar loads so i can test different hang angles, etc. any advice?

mods, if this is in the wrong forum, please move it.